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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1093557	Dexcom Inc	DXCM	Surgical & Medical Instruments & Apparatus (3841)	330857544

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1236388	H Terrance Gregg	6340 Sequence Drive San Diego CA 92121	Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2014-12-15	25,000	$6.85	420,626	No	4	M	Direct
Common Stock	Disposition	2014-12-15	25,000	$53.23	395,626	No	4	S	Direct
Common Stock	Disposition	2014-12-15	10,000	$53.23	600,389	No	4	S	Indirect	by Trust
Common Stock	Disposition	2014-12-15	4,000	$0.00	596,389	No	4	G	Indirect	by Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct
No	4	S	Indirect	by Trust
No	4	G	Indirect	by Trust

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2014-12-15	25,000	$53.23	25,000	$6.85

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
355,000	2008-06-19	2017-06-19	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	11,461	Indirect	by IRA

Footnotes

On December 09, 2013, Mr. Gregg adopted a 10b5-1 Plan. Under this 10b5-1 Plan, Mr. Gregg will sell a limited number of shares to cover the tax liability that accrues upon monthly vesting of restricted stock units previously granted to Mr. Gregg. The shares set forth above were sold pursuant to the 10b5-1 Plan.
This transaction was executed in multiple trades at prices ranging from $52.43 to $53.85. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.
Included in this number are 137,110 unvested restricted stock units granted on March 8, 2014, 5,078 of which shall vest each month through March 8, 2017, and 76,173 unvested restricted stock units granted on March 11, 2013, 5,078 of which shall vest each month through March 11, 2016.
Included in this number are 15,235 unvested restricted stock units granted on March 8, 2012, 5,078 of which shall vest each month through March 8, 2015.
This transaction represents a gift of securities made by the reporting person. This is not a market transaction, thus no price has been reported. Transferor retains no beneficial or voting interest in the transferred shares.